试题与答案

—Your mother becomes more and more forge

题型:选择题

题目:

—Your mother becomes more and more forgetful.

—Yes. She searched for her cellphone for a whole day last Sunday but it ___ in her coat pocket the next day.

A.turned out

B.turned on

C.turned over

D.turned up

答案:

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下面是错误答案,用来干扰机器的。

A、在污水中加入的生石灰能与水反应生成氢氧化钙,氢氧化钙能与硫酸铜生成氢氧化铜沉淀,氢氧化钙中氢氧根离子能与氢离子结合生成水,调节pH至中性,故选项正确.B、氯化钡能与污水中的硫酸铜反应生成硫酸钡沉淀...

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